Tits or ass, ass or tits? The evergreen question.

Isaac found himself staring up at the top of Rarity's four-poster bed and thinking, which was something he'd been hoping to do very little of. But his next step forward presented a small conundrum.

Rarity had slowly pulled herself off his cock and was now snuggling beside him as the leftover semen slowly evaporated in its magically self-cleaning way. "Lost in thought again? Want to talk through it with me some more?"

With a sigh, Isaac decided he might as well. "The thing is this: I'm on track to fucking all six of you Elements of Harmony in one day."

Rather than being offended at being reduced to a figurative notch on Isaac's belt, Rarity shuddered in lust. "Such a stud...! I'm honored."

He glanced out the window of Rarity's bedroom. It was roughly the mid-afternoon, so there was still a good chunk of daylight left. "I've just got Applejack and Fluttershy left, and I'm not sure which order to tackle them in. They both live on the outskirts of Ponyville, and they both have... different appeals. Fluttershy has the largest breasts in Ponyville, right? And Applejack has the biggest ass in Ponyville?"

Rarity's lips scrunched up in something that was between a wry smirk and an envious pout. "Much to my chagrin, darling. Try as I might with my supple hourglass figure, I can't quite claim the top spot in either category. But I'm happy for them, truly, even if neither of them is the type to capitalize on their good fortune..." She gave him a wink. "Perhaps you can show them how lucky they are, hmmm?"

Isaac couldn't help but grin. "I'll try, heh. But now I'm just wondering... which one I'm gonna try to find first, and which one I'll finish the day with. There's upsides to either order, in my mind." He raised one finger. "I'm a boob man, and I like to save the best for last, so I'm tempted to see Applejack first and then finish by fully indulging in Fluttershy's boobs." Then he raised the other finger. "But... Fluttershy's got all those animals, several of which I'm probably going to be allergic to, whereas Applejack's got a whole farmhouse and several family members who can offer a warm welcome with their southern hospitality, which I think would make a better place to end the night."

"Why not both?" Rarity offered, raising her eyebrows provocatively. "Fluttershy's amazingly soft tits AND Applejack's firm, perky, tree-slamming rump at the same time! I'm sure it would be trivial if you had any of us help you summon her to Sweet Apple Acres."

"Ehhh..." Isaac hemmed and hawed. "I've been giving all of you as much one-on-one attention as reasonably possible so far. I could be economical about this, but I'd rather keep that pattern going. This is my first day fucking you all in Ponyville. I want it to be at least a little special."

"Like letting me be your personal hard-working fuck-doll, hm?" Rarity teased.

Isaac chuckled and grinned wider. "Hey, you taught me a very timely lesson about pacing myself. It's thematic." He looked back at the ceiling and thought some more. "...I think my problem is that going Fluttershy then Applejack is the better option, but I don't really know where I want to fuck Fluttershy if not her cottage. I think we'd both want somewhere a little more comfortable than just, y'know, in the street..."

His train of thought was disrupted by Rarity abruptly leaning over and kissing him on the nose. "This is where it pays to have ponies with connections in your harem, darling. Might I propose the Ponyville Day Spa? I'm sure you could easily convince the girls there to lend you a private room and all the tools you need for some sensual breast-loving~..."

Isaac sat up as all the pieces came together in his mind. "Rarity, you're a genius. Can you arrange to have Fluttershy meet me there as soon as possible?"

"I live to maximize the joy of others," Rarity quipped, propping up her head as she laid on her side to look at him. "I've picked up on some of Twilight's spells; I can send a letter to her posthaste. All I ask in return is that, sometime down the line, the three of us schedule a proper spa day to ourselves, to truly relax and let our bodies get to know each other thoroughly...!"

"Sounds perfect," Isaac agreed, looking around quickly for wherever he'd left his clothes. Once he was semi-modest again, he waved goodbye and left the fashionista, not wanting to waste any daylight on completing the set, as it were.

As he left, Rarity levitated several tape measures that she'd surreptitiously measured Isaac's dimensions with. "And, of course, a Harem Master needs the finest wardrobe..."